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src/share/vm/gc_implementation/shared/spaceCounters.hpp@aaf61e68b255 (annotated)
src/share/vm/gc_implementation/shared/spaceCounters.hpp
Mon, 06 Aug 2012 12:20:14 -0700
- author
- johnc
- date
- Mon, 06 Aug 2012 12:20:14 -0700
- changeset 3982
- aaf61e68b255
- parent 3900
- d2a62e0f25eb
- child 4153
- b9a9ed0f8eeb
- permissions
- -rw-r--r--
6818524: G1: use ergonomic resizing of PLABs
Summary: Employ PLABStats instances to record information about survivor and old PLABs, and use the recorded stats to adjust the sizes of survivor and old PLABS.
Reviewed-by: johnc, ysr
Contributed-by: Brandon Mitchell <brandon@twitter.com>
| duke@435 | 1 | /* |
| stefank@2314 | 2 | * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. |
| duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| duke@435 | 4 | * |
| duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
| duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| duke@435 | 7 | * published by the Free Software Foundation. |
| duke@435 | 8 | * |
| duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| duke@435 | 13 | * accompanied this code). |
| duke@435 | 14 | * |
| duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
| duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| duke@435 | 18 | * |
| trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
| trims@1907 | 21 | * questions. |
| duke@435 | 22 | * |
| duke@435 | 23 | */ |
| duke@435 | 24 | |
| stefank@2314 | 25 | #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_SPACECOUNTERS_HPP |
| stefank@2314 | 26 | #define SHARE_VM_GC_IMPLEMENTATION_SHARED_SPACECOUNTERS_HPP |
| stefank@2314 | 27 | |
| stefank@2314 | 28 | #ifndef SERIALGC |
| stefank@2314 | 29 | #include "gc_implementation/shared/generationCounters.hpp" |
| stefank@2314 | 30 | #include "gc_implementation/shared/immutableSpace.hpp" |
| stefank@2314 | 31 | #include "gc_implementation/shared/mutableSpace.hpp" |
| stefank@2314 | 32 | #include "runtime/perfData.hpp" |
| stefank@2314 | 33 | #endif |
| stefank@2314 | 34 | |
| duke@435 | 35 | // A SpaceCounter is a holder class for performance counters |
| duke@435 | 36 | // that track a space; |
| duke@435 | 37 | |
| zgu@3900 | 38 | class SpaceCounters: public CHeapObj<mtGC> { |
| duke@435 | 39 | friend class VMStructs; |
| duke@435 | 40 | |
| duke@435 | 41 | private: |
| duke@435 | 42 | PerfVariable* _capacity; |
| duke@435 | 43 | PerfVariable* _used; |
| duke@435 | 44 | |
| duke@435 | 45 | // Constant PerfData types don't need to retain a reference. |
| duke@435 | 46 | // However, it's a good idea to document them here. |
| duke@435 | 47 | // PerfConstant* _size; |
| duke@435 | 48 | |
| duke@435 | 49 | MutableSpace* _object_space; |
| duke@435 | 50 | char* _name_space; |
| duke@435 | 51 | |
| duke@435 | 52 | public: |
| duke@435 | 53 | |
| duke@435 | 54 | SpaceCounters(const char* name, int ordinal, size_t max_size, |
| duke@435 | 55 | MutableSpace* m, GenerationCounters* gc); |
| duke@435 | 56 | |
| duke@435 | 57 | ~SpaceCounters() { |
| zgu@3900 | 58 | if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space, mtGC); |
| duke@435 | 59 | } |
| duke@435 | 60 | |
| duke@435 | 61 | inline void update_capacity() { |
| duke@435 | 62 | _capacity->set_value(_object_space->capacity_in_bytes()); |
| duke@435 | 63 | } |
| duke@435 | 64 | |
| duke@435 | 65 | inline void update_used() { |
| duke@435 | 66 | _used->set_value(_object_space->used_in_bytes()); |
| duke@435 | 67 | } |
| duke@435 | 68 | |
| duke@435 | 69 | inline void update_all() { |
| duke@435 | 70 | update_used(); |
| duke@435 | 71 | update_capacity(); |
| duke@435 | 72 | } |
| duke@435 | 73 | |
| duke@435 | 74 | const char* name_space() const { return _name_space; } |
| duke@435 | 75 | }; |
| duke@435 | 76 | |
| duke@435 | 77 | class MutableSpaceUsedHelper: public PerfLongSampleHelper { |
| duke@435 | 78 | private: |
| duke@435 | 79 | MutableSpace* _m; |
| duke@435 | 80 | |
| duke@435 | 81 | public: |
| duke@435 | 82 | MutableSpaceUsedHelper(MutableSpace* m) : _m(m) { } |
| duke@435 | 83 | |
| duke@435 | 84 | inline jlong take_sample() { |
| duke@435 | 85 | return _m->used_in_bytes(); |
| duke@435 | 86 | } |
| duke@435 | 87 | }; |
| stefank@2314 | 88 | |
| stefank@2314 | 89 | #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_SPACECOUNTERS_HPP |
